Is a 12-hour fasting period sufficient to complete gastric emptying in horses?

ABSTRACT Introduction : Considering the practice of preoperative fasting based on observations on the gastric emptying delay after induction and the time of this fast is closely linked to organic response to trauma, arise the question about preoperative fasting period necessary to minimize such response and support the professional with clinical and scientific evidence. Aim : To review the aspects related to the abbreviation of preoperative fasting from the metabolic point of view, physiology of gastric emptying, its clinical benefits and the currently recommendations. Method : Literature review was based on articles and guidelines published in English and Portuguese, without restriction of time until January 2017, in PubMed, SciELO and Cochrane with the descriptors: surgery, preoperative fasting, carbohydrate. From the universe consulted, 31 articles were selected. Results : The literature suggests that the abbreviation of fasting with beverage added carbohydrates until 2 h before surgery, can bring benefits on glycemic and functional parameters, reduces hospitalization, and does not present aspiration risk of healthy patients undergoing elective surgery. Another nutrient that has been added to the carbohydrate solution and has shown promising results is glutamine. Conclusion : The abbreviation of preoperative fasting with enriched beverage with carbohydrates or carbohydrate and glutamine seems to be effective in the care of the surgical patient, optimizing the recovery from of postoperative period.

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Evaluation of gastric emptying by ultrasonography after recommended fasting period and administration of prokinetic in end-stage renal disease patients

Anesthesia Essays and Researches ◽

10.4103/aer.aer_18_20 ◽

2020 ◽

Vol 14 (1) ◽

pp. 42

Author(s):

AbhimanyuSingh Pokhriyal ◽

Richa Gupta ◽

Parul Jindal ◽

Rajeev Sarpal ◽

Mamta Goyal

Keyword(s):

Gastric Emptying ◽

Renal Disease ◽

End Stage Renal Disease ◽

Fasting Period ◽

Stage Renal Disease ◽

End Stage

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Refinement of the Charcoal Meal Study by Reduction of the Fasting Period

Alternatives to Laboratory Animals ◽

10.1177/026119291204000209 ◽

2012 ◽

Vol 40 (2) ◽

pp. 99-107 ◽

Cited By ~ 8

Author(s):

Helen Prior ◽

Lorna Ewart ◽

Jonathan Bright ◽

Jean-Pierre Valentin

Keyword(s):

Small Intestine ◽

Gastric Emptying ◽

Stomach Contents ◽

Body Weight Loss ◽

The Body ◽

Intestinal Transit ◽

Fasting Period ◽

Intestinal Transit Time ◽

The One ◽

Rats And Mice

The aim of this investigation was to determine whether a shorter fasting period than the one historically employed for the charcoal meal test, could be used when measuring gastric emptying and intestinal transit within the same animal, and to ascertain whether the scientific outcome would be affected by this benefit to animal welfare. Rats and mice were fasted for 0, 3, 6 or 18 hours before the oral administration of vehicle or atropine. One hour later, the animals were orally administered a charcoal meal, then 20 minutes later, they were killed and the stomach and small intestine were removed. Intestinal transit time (the position of the charcoal front as a percentage of the total length of the small intestine) and relative gastric emptying (weight of stomach contents) were measured. Rats and mice fasted for six hours showed results for gastric emptying and intestinal transit which were similar to those obtained in animals fasted for 18 hours. Reducing the fasting period reduced the body weight loss in both species, and mice on shorter fasts could be group-housed, as hunger-induced fighting was lessened. Therefore, a fasting period of six hours was subsequently adopted for charcoal meal studies at our institution.

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